Design Strategy for Compact Bandpass Filters Using Meander Line Resonators
Keywords:Band-pass filters (BPFs), dual BPF, even and odd mode analysis, stub loaded resonators (SLR), triple BPF, quad BPF
The purpose of this manuscript is to present a compact design strategy for bandpass filters using Meander Line Resonators (MLR) in combination with Stub Loaded Resonators (SLR). The proposed resonator has been designed and analyzed using even-odd mode analysis. Open-ended stubs are loaded at an appropriate position in the dual-mode resonator to achieve tri, quad, and quintuple passbands. To reduce the circuit size and create transmission zeros at our desired frequencies, a symmetrical meandered shape resonator is loaded with open-ended identical stubs which are bent towards each other. A design strategy is presented step by step and the approach is validated using simulation and experiments.
X. Y. Zhang, J. X. Chen, Q. Xue, and S. M. Li, “Dual-band bandpass filters using stub-loaded resonators,” IEEE Microwave and Wireless Components Letters, vol. 17, pp. 583-585, 2007.
L. C. Liang, H. Di, and B. Wu, “Design of tri-band filter based on stub loaded resonator and DGS resonator,” IEEE Microwave and Wireless Components Letters, vol. 20, pp. 265-267, 2010.
S. W. Lan, M. H. Weng, S. J. Chang, C. Y. Hung, and S. K. Liu, “A tri-band bandpass filter with wide stopband using asymmetric stub loaded resonators,” IEEE Microwave and Wireless Components Letters, vol. 25, no. 1, pp. 19-21, Jan. 2015.
M. Rahman, W. T. Khan, and M. Imran, “Pentanotched UWB antenna with sharp frequency edge selectivity using combination of SRR, CSRR, and DGS,” Int. J. Electron. Commun. (AEÜ), vol. 93, pp. 116-122, 2018.
M. Rahman, D. S. Ko, J. D. Park, “A Compact Multiple Notched Ultra-Wide Band Antenna with an Analysis of the CSRR-TO-CSRR Coupling for Portable UWB Applications,” Sensors, 17, 2174, 2017.
M. Rahman and J. D. Park, “The smallest form factor UWB antenna with quintuple rejection bands for IoT applications utilizing RSRR and RCSRR,” Sensors, 18, 911, 2018.
N. Kumar and Y. Singh, “Compact tri-band bandpass filter using three stub-loaded open loop resonators with wide stopband and improved bandwidth response,” Electronics Letters, vol. 50, no. 25, pp. 1950-1952, Dec. 2014.
Y. H. Cho and S. W. Yun, “A tri-band bandpass filter using stub loaded SIRS with controllable bandwidths,” Microwave and optical technology letters, vol. 56, no. 12, pp. 2907-2910, Apr. 2014.
M. Rahman and J.-D. Park, “A compact tri-band bandpass filter using two stub-loaded dual mode resonators,” Progress in Electromagnetic Research M, vol. 64, pp. 201-209, 2018.
X. J. W. Wu and C. Miao, “Compact microstrip dual-/tri-/quad-band bandpass filter using open stubs loaded shorted stepped-impedance resonator,” IEEE Transactions on Microwave Theory and Techniques, vol. 61, no. 9, pp. 3187-3199, Sept. 2013.
M. Rahman, M. NaghshvarianJahromi, S. S. Mirjavadi, and A. Hamouda, “Bandwidth enhancement and frequency scanning array antenna using novel UWB filter integration technique for OFDM UWB radar applications in wireless vital signs monitoring,” Sensors, vol. 18, no. (9), p. 3155, 2018.
M. Rahman, D. S. Ko, and J. D. Park, “A compact tri‐ band bandpass filter utilizing double mode resonator with 6 transmission zeros,” Microwave and Optical Technology Letters, vol. 60, no. 7, 1767-1771, 2018.
Z. M. Hejazi, “A fast design approach of compact microstrip multiband bandpass filters,” Microwave and Optical Technology Letters, vol. 54, no. 4, pp. 1075-1079, 2012.
A. Sami, M. Rahman, and S. Bashir, “Design of compact tri and quad band band-pass filters using stub loaded resonators for wireless applications,” SN Applied Sciences, vol. 1, no. 9, p. 1019, 2019.
W. W. H. and Y. R. Yuan, “A new quadband bandpass filter using asymmetric stepped impedance resonator,” Microwave and Wireless Components Letters, vol. 21, no. 4, pp. 203-205, Apr. 2011.
M. Nejatijahromi, M. Rahman, and M. Naghshvarianjahromi, “Continuously tunable WiMAX band-notched UWB antenna with fixed WLAN notched band,” Progress In Electromagnetics Research Letters, vol. 75, 97-103, 2018.
M. NejatiJahromi, M. NagshvarianJahromi, and M. Rahman, “A new compact planar antenna for switching between UWB, narrow band and UWB with tunable-notch behaviors for UWB and WLAN applications,” Applied Computational Electromagnetics Society Journal, vol. 33, no. 4, Apr. 2018.
M. NejatiJahromi, M. NagshvarianJahromi, and M. Rahman, “Compact CPW fed switchable UWB antenna as an antenna filter at narrow-frequency bands,” Progress In Electromagnetics Research C, 81, 199-209, Jan. 2018.
M. Rahman, M. NaghshvarianJahromi, S. S. Mirjavadi, and A. Hamouda, “Compact UWB band-notched antenna with integrated Bluetooth for personal wireless communication and UWB applications,” Electronics, 8, 158, 2019.
M. Rahman, M. NaghshvarianJahromi, S. S. Mirjavadi, and A. Hamouda, “Resonator based switching technique between ultra wide band (UWB) and single/dual continuously tunable-notch behaviors in UWB radar for wireless vital signs monitoring,” Sensors 2018, 18, 3330, 2018.
A. Sami and M. Rahman, “A very compact quintuple band bandpass filter using multimode stub loaded resonator,” Progress In Electromagnetics Research, vol. 93, pp. 211-222, 2019.
W. F. Q. Huang and X. -W. Shi, “A compact quadband bandpass filter using novel stub loaded SIR structure,” Microwave and Optical Technology Letters, vol. 56, no. 3, pp. 538-542, Mar. 2014.